# Performance The **Performance** tab shows how a Windows device behaves over time. The data comes from **Endpoint analytics** in Microsoft Intune. | Section | Content | | --- | --- | | **OS Restart History** | Every restart with date, operating system version, restart category (for example *Update*), stop code and failure bucket ID. Repeated restarts with a stop code point to crashes. | | **Device Timeline** | Events on the device: boots with their duration, application crashes and more, with level and source. | | **Battery Health** | Battery capacity and health of laptops. | Use **Refresh** in each section to load the latest data from Microsoft Intune. > **Device Timeline** and **Battery Health** need the *Microsoft Intune Advanced Analytics* add-on. Without it, the portal shows a message instead of the data. Endpoint analytics must also be enabled in your Microsoft Intune tenant.